Hammer mfg



M. M. GOLDENSTEIN.

MOTOR CONTROLLER.

APPLICATION FILED MAY 22, 19I6.

Patented June 24, 1919.

Jmallmbr.

6 mm mwmm mm UNITED STATES PATENT omen.

MAURICE M. GOLDENSTEIN, OF MILWAUKEE, WISCONSIN, ASSIGNOR TO THE CUTLER- HAMMER MFG. 00., OF MILWAUKEE, WISCONSIN, A CORPORATION OF WISCONSIN.

MOTOR-CONTROLLER.

Controllers of which the following is a full,

clear, conc1se,and exact description, reference being had to the accompanying drawing, forming a part of this specification.

This invention relates to improvements in motor controllers. i

The invention is particularly applicable to controllers for motor driven printing presses and especially to the solenoid operated cross-head type commonly employed'in printing press control. However, as will be obvious, certain features of the invention are applicable to controllers of other types. Controllers of the aforesaid type are designed for automatic movement subject to arrest in different running positions at the will of the operator, and this invention has among its objects to provide for automatic return of the cross-head to oil position upon unwilled movement thereof from any se-' lected position. I

Such controllers are also commonly employed for double motor drlves, being equipped with separate main switches for the controlled motors, and it is another object of this invention to provide for automatic return of the cross-head to off position when the main switch of either motor fails to respond at the proper time or opens accidentally after responding.

Other objects aretosimplify the inching .means and connections and to subject the large motor switch directly to control by the paper break switch for the purpose hereinafter set forth.

Still further objects and advantages of the invention will hereinafter appear.

One embodiment of the invention is schematically and diagrammatically illustrated in the accompanying drawing and the same will now be described, it being understood that the controller illustrated is susceptible of various modifications without departing fromthe scope of the appended claims.

The controller illustrated is designed particularly for a double motor drive for printing presses andcmbodies a rheostat 1 of the cross-head type. The controlled motors and their power connections have been omitted Specification of Letters Patent. Patented J 11119 Application filed May 22, 1916. Serial No. 99,107.

for simplification of the diagram but the diagram includes electromagnetic main switches 2 and 3 for the two controlled motors.

More

particularly the controller is designed to govern a drive comprising a small motor and a large motor, the switch 2 being provided to control the continuity of the small motor cir- .cuit and the switch 3 to control the continuand 1" and is in general construction of con ventional form. It includes a cross-head 4: adapted to descend by gravity to cooperate w1th a plurality'of sets ofcontacts including the contacts of the armature and 'field resistances and adapted to be raised by a solenoid 5. The solenoid 5 has a'notched plunger 6 with which cooperates a latching dog 7 whereby the cross head may be arrested in different speed regulating positions. Withdrawal of the latching dog from engagement with the notched plunger allows the crosshead to descend by gravity while energization of the solenoid 5 provides for return .movement of the cross-head and as will be understood, the cross-head in descending gradually cuts. out the armature resistance and v gradually inserts the field; resistances for acceleration of the large motor, while return movement of said cross-head serves to slow down the motor.

The main switches and rheostat are controllable at will from a push button control station PB through the medium of relays and as will hereinafter appear the main switches and certain of the relays are sub- ,jected. to further control by the rheostat.

The control station includes an"on push button switch 8 controlling an on relay 8 operatively connected to the latching dog 7 and responsive to release the cross-head and an off-inch push button switch 9 controlling an off relay 9 responsive to energize solenoid 5. push button switch 9 also serves to directly control the main switch of the small motor to provide for inching. The control station further includes a stop push button switch 10 controlling a stop relay 10 and a safepush button switch 11 controlling Under certain conditions the a safe relayll. Both the stop, and

safe relays are normally closed and are responsive to lnterrupt certain connectlons,

.the former to deenergize the main switches and the latterfto prevent energization of the on relay with the usual results. As above stated the main switchesare' subjected to control by the rheostat and such control is effected through the medium of a main relay 12, controlled by auxiliary contacts of the rheostat and by the on relay jointly. The main relay must respond for energization of the main switches and continued energization of the main switches is dependent upon retention of both the main and stop relays in closed position, that is the upper contacts of the main relay.

Considering the rheostat in further detail, the cross head 4 thereof has in addition to the resistance contacts, two sets of auxiliary contacts. One set of contacts includes a strip 20 and a series of buttons 21, two for each step of travel of the cross-head and the cross-head is provided with an insulated section 4 adapted to progressively connect the contact buttons to the strip. The outer set of auxiliary contacts includes a strip 22, a button 23 and strips 24 and 25 and to cooperate with such contacts the cross-head is provided with an insulated section 4*. The section 4 of the cross-head provides for progressive connection of the contacts 23, 24 and 25 to strip 22. Further, the crosshead has associated therewith electrically independent limit switches 26 and 27 -to be actuated thereby upon full upward movement thereof. The switch 26 is of the single throw type and adapted to close upon descent of the cross head, while the swit-ch 27 is of the double throw type to selectively establish two circuits according to the position of the cross-head. Still further, the rheostat has an auxiliary contact member 30 above the solenoid 5 and movable with. the cross-head 4 to cooperate with three series of contacts. One series of contacts includes a button 31, a strip 32 and two other buttons 33 and 34. Another series includes'a button 35- and a strip 36, while the third series includes a button 37, a dead strip 38, a button 39 and a strip 40. -The contact member 30 in initial position bridges buttons 31, 35 and 37 and upon disengaging said buttons bridges strips 32, 36 and 38. Then upon continued movement it bridges strips 32,- 36 and button 39 and thereafter leaves strip 32 and button 39 to bridge button 33, strip 36 and strip 40. Finally it disengages button 33 and bridges only strips 36 and 40. I

Oonsidering in further detail the several relays the on relay has two set-s of auxiliary contacts 8 and 8, which are electrically independent and adapted to close circuit upon response of said relay. Off

I relay 9 has two like. sets of auxiliary contacts 9" and-9, while main relay 12 has auxiliary contacts 12 to engage upon deenergization of said relay. Main switches 2 and 3 also have auxiliary contacts 2 and 3 respectively to engage upon response of said switch 3.

' The circuits established by the control station are as follows: With the rheostat in initial position as illustrated, closure of on switch 8 completes circuit from line L through said switch, by conductor 41 through the Winding of on relay 8*, by conductor 42 through safe relay 11 by conductor 43 to line L. This provides for energization of the on relay to release the cross-head. With the rheostat in the position illustrated, closure of the offinch switch 9 completes circuit from line L through said switch, by conductor 44 to limit swltch 27 and its contact 27, by conductor 45 through the winding of small motor switch 2, by conductor 46 to auxiliary contact 31 of the rheostat, through member 30 to contact 35, by conductor 47 through the safe relay to conductor 43 and thence to line L. This provides for direct control of the main switch of the small motor for inching and thereby eliminates the necessity for intermediate relays. On the other hand, with the rheostat in any running position, closure of the off-inch switch completes circuit from line L to conductor 44 and switch 27 through contact 27 thereof, by conductor 48 through winding of ofi relay 9*, by conductor 49 through limit switch 26, by conductors 50 and 51 to line L. This provides for energization of the ofi relay and hence for energization of the rheostat solenoid 5 controlled thereby. Closure of the stop .3 switch 10 completes circuit from line L through said switch, by conductor 52 through the winding of stop relay 10, by conductor 53 to line L. This efi'ects response of relay 10 which functions as hereinafter described. Closure of the safe switch 11 completes circuit from line L through said switch, by conductor 54 through the winding of safe relay 11 to conductor 51 and thence to line L. This efiects response of relay 11 and in consequence effects interruption of the circuit of on relay 8 to thereby insure against response thereof in any position and also insures against energization of the main relay and small motor switch in initial position of the cross-head. Thus the circuits described provide for reverse operations of the rheostat at the will of the operator throughthe push button switches and their associated relays and for energization of the small motor switch for inching when the rheostat is in initial position.

On relay in responding releases the rheostat cross head and also through its main contacts completes the circuit of the main relay. This circuit may be traced from line L by conductor 55 through stop relay 10*, by conductors 56 and 57 to contact strip 20 of the rheos'tat across section 4 of the cross head to the uppermost contact 21, by cross connector 58 to strip 22 and across section 4 of the cross head to button 23-, by conductors 59 and 60 through the winding of main relay, by conductor 61 to and through the-on relay, by conductor 62 to auxiliary contact 37 of the rheostat, through member 30 to contact and thence by conductor 47 to and through the safe relay to line L. .Thus the main relay is energized to complete circuit from line L through stop relay 10*, by conductor 56 to conductor 45 through the winding of the small motor switch to conductor 46 and thence through auxiliary contact 31, member 30 and contact 35 of the rheostat to line L as already traced. The small motor is thus started whereas the rheostat cross head is released for descent.

Initial downward movement of the cross head releases limit switch 26 which upon closing completes a maintaining circuit for the main relay from conductor 61 through resistance r to conductor 50 and thence di-' rectly to line L so that the on relay may be deenergized without affecting said main relay. Also, the rheostat through member- 30 inserts the resistance r in the energizing circuit of the small motor switch by disengaging auxiliary contact 31. Moreover, the member 30 by disengaging button 35 and engaging strip 36 changes the circuit of the small motor switch to shuntthe safe relay through conductor 64 to conductor 43 and thence to line L. The small motor will then continue to operate until the member 30 progressively leaves strip'32 and button 33, the irov'ement from the strip to 1 the button merely changing the small motor circuit from its path through resistance r to and through resistance r During such movement of member 30 it engages contact 39 which results inthe esof on relay, by conductor 68 to rheostat motor switch, thereby stopping the same and a in the meantime by disengaging button 39 and engaging strip 40 it establishes a maintaining circuit for the large motor switch from conductor 67 through resistance r direct to line L through conductors 64 and 43. Thus should the large motor switch now open from any cause the resistance 1' would prevent its subsequent energization without prior return movement of the rheostat. Here, also, it is to be noted that the on relay when open effects the insertion of resistance 7" between the winding of the large motor switch and contact39 whereby energization of said on relay is essential to initial energization of the large motor switch.

During the above described circuit commutations, that is during the described movement of the rheostat, certain important changes are effected in the circuit of the winding of the main relay. As above described, the energizing circuit of the main relay extends through auxiliary contact 23 of the rheostat whereas the cross head disengages said contact immediately upon descending. However, the cross head upon disengaging contact 23 engages segment 24 which provides a maintaining circuit for the main relay through the auxiliary contacts 2 ofi small motor switch 2, assuming said switch to be closed. This circuit extends from strip 22 through the crom head to strip 24 by conductor 70 through the auxiliary contacts 2 of switch 2 to conductor 60 and thence to the winding of main relay as already traced. Thereby provision is made for deenergizing the main relay if for any reason the small motor switch fails to respond or for any reason opens after responding. Moreover, the length of segment 24 corresponds to the travel of the member 30 to elfect energizationof the large motor switch whereby the main relay will open and preclude the energization of the large motor switch if for any reason the small motor switch is open prematurely. Further, the cross head upon descending for speed reg.- ulation disengages strip 24 and engages strip 25 whereby the maintaining circuit for the main relay is shifted to the auxiliary contacts of the large motor switch which, as is obvious, parallel the auxiliary contacts of the small motor switch 2. Accordingly if for any reason the large motor switch fails to respond or opens after responding, the main relay will be deenergized and as will hereinafter appear, whenever the main? re- Still further, the circuit of the winding of the main relay is controlled by the-section s of the rheostat cross head and its cooperating contacts. As above set forth the circuit of the winding of the main relay initially extends from the contact strip 20 to the uppermost contact button 21 and thence to strip 22 and it will be observed that the arrangement of contact buttons 21 is such that in all latched positions of the cross head said cross head will bridge the strip 20 and one of'the contacts connected to the strip 22 whereby a maintaining circuit is insured for the main relayin all running positions. On the other hand, the contact buttons 21, corresponding to the intermediate positions of the cross head, are dependent for connection to strip 22 upon the auxiliary contacts 8 of the on relay or 9 of the off relay. That is to say, the intermediate buttons 21 are connected to a common conductor 71 and are adapted to be connected to contact strip 22 by conductor 72 and cross connections 58, by the auxiliary contacts 8 and 9 of either of the relays mentioned, which relays as is apparent, have their auxiliary contacts connected in parallel. Thus, whereas the cross head in passing over the intermediate contacts would tend to deenergize the main relay the circuit of said relay will be maintained if either the on or off relay is energized to engage its auxiliary contacts. On the other hand, if, after the cross head is stopped in any running position, under which conditions both the on and off relays are deenergizedl, said cross head should accidentally drop it would, upon passing onto the first intermediate button, denergize the main relay. The main relay would then open and stop the motor'in operation and furthermore effect return of the rheostat to initial position. Thus upon accidental dropping of the cross head the operator is immediately notified thereof by the stopping of the motor or motors in operation and the controller is returned to proper position for restarting.

Deiinergization of the main? relay effects return of the cross head to initial position by energization of the off relay. It completes the circuit of the off relay by its down contacts 12 and said relay upon responding energizes the rheostat solenoid 5. When, however, the rheostat is returned to initial position the limit switch 26 interrupts the circuit of the off relay which opens and thereby deenergizes the solenoid 5.

Here itis to be noted that the off-inch switch also provides for energization of the off relay for either partial or full return movement of the cross head at the will of the operator. Further, it is to be noted that if the ofi-inch switch is held closed for full return movement of the cross head the small motor switch will remain energized through the above described inching connections until the off-inch switch is released, whereupon the former switch is de'e'nergized to stop the small motor.

' The stop relay when energized interrupts the circuits of both of the motor controlling switches and of the main relay. Accordingly as soon as the stop relay is denergized it will energize the off relay through the down contacts of the main relay to restore the rheostat to initial position as described.

The safe relay when energized interrupts the circuit of the on relay and thereby locks the rheostat against descent. Also, the safe relay interrupts the initial energizing circuitof the small motor controlling switch whereby said switch is insured against energization by the inching switch.

Finally considering the paper break switch S, it will be observed that the same is included directly in the circuit of the large motor switch and accordingly it will if opened before the large motor switch responds, insure against response thereof. This prevents needless operation of said switch and undesirable jerking of the press. On the other hand, when the paper break switch opens while the large motor switch is closed it immediately deenergizes the same and-said switch in turn denergizes the main relay. This effects return of the cross head to initial position and dee'nergization of the small motor switch if the same happens to be closed when the paper break switch opens. However, when the cross head is returned to initial position the small switch may be energized for slow speed operation of the press.

As stated, the controller illustrated is susceptible of modifications while various features thereof may be advantageously employed in other relations.

l/Vhat I claim as new and desire to secure by Letters Patent is:

1. In a controller, in combination, a controlling element movable to difierent positions of rest, automatic means tending upon movement of said element away from any one of said positions of rest to move the same to a predetermined position and manually controlled means to temporarily render said automatic means inoperative for permitting the desired positioning of said element.

2. In a controller, in combination, a controlling element movable to different positions of rest, a power device for returning said element to initial position and means rendering said power device responsive to movement of said member from any position of rest, said means including means controllable at will to permit movement of sald member independently of said device for the desired positioning thereof.

5. In a controller, in combination, acon trol member, a power device for moving said member to different positions of rest, manual means for directing the movement of said member by'said deviceand means to render said power device effective for predetermined positioning of said member upon undirected movement thereof from any position of rest.

6. In a controller, in combination, a control member biased to move in one direction, power means for moving said member in a reverse direction, means for directing the reverse operation of said member and arresting the same in different positions and means controlled by said directing means to effect response of said power means upon undirected movement of said member from any position of rest.

7. In a controller, in combination, a control element movable to different positions of rest, power means for returning said. element toward initial position, and control means for said power means governable at will to effect partial return of said element to any intermediate position of rest and governable by said element to effect full return movement of the latter upon undirected movement thereof from any position of rest.

8. In a controller, in combination, an automatically movable member having definite positions of rest, means tending in all intermediate positions of said member to effect its movement direct to a given position and means controllable at will to direct said member from one position to another and during the travel of said member to render said former means ineffective.

9. In a controller, in combination, an automatically movable controlling element, movable automatically in reverse directions, means for directing movement of said element in either direction to ositions of rest and means subordinate to said former means to direct movement of said element to a given position upon undirected movement of the latter from any position of rest.

10. In a controller, in combination, a controlling element movable to different positions of rest, electromagnetic operating means for said element, control means for said electromagnetic means governable at will to effect automatic movement of said element from one position of rest to another and means governing said energizing means to render the same eifective for directing movement of said element to a given position upon undirected movement of the latter from any position of rest.

11. Ina controller for a plurality of mo-- tors, in combination, separate motor controlling switches having power operating means, a device movable to elfect operation of said switches progressively and means to effect return movement of said device automatically upon failure of any one of said switches to respond thereto 12. In a controller for a plurality lof.

motors, in combination, separate motor controlling switches having power operating means, a device movable to effect operation of said switches progressively and means to effect return movement of said device automatically upon failure of any one of said switches to respond thereto or upon premature opening of any one of said switches after response thereof.

13. In a controller for a plurality of motors, in combination, separate motor controlling switches having power operating means, a device movable to eflect response of said switches progressively, means rendering response of one of said switches depend-- ent upon prior response of the preceding switch and means for effecting automatic return movement of said device upon'failure of any one of said switches to respond to said device or upon premature opening of any one of said switches after response thereof.

H. In a controller for a plurality of motors, in combination, separate electro-responsive switches for controlling the circuits of the plurality of motors, an e'lectro-responsive relay common to the energizing circuits of said -switches,-means to energize said relay and said switches progressively including a governing device movable at will, means to return said device to initial position automatically upon deencrgization of said relay and connections rendering the energization of said relay dependent upon closure of one or the other of said switches after movement of said device from initial position.

15. In a controller for a plurality of motors, in combination, separate electro-responand connections rendering the energization of said relay dependent upon closureof one. 3

or the other of said switches after movement L of said device from initial position and rendering initial energization of one of said switches dependent upon prior and continued energization of the preceding switch.

16. In a controller for a motor set including a large motor and a small motor, in combination, separate electro-responsive switches to control the continuity of circuit of the two motors, an electro-responsive relay common to the energizing circuits of said switches, means including a rheostat for the large motor to effect progressive energization of said relay and said switches, said rheostat tending upon establishment of the energizing circuit of each of said switches to denergize said main relay and said switches having auxiliary contacts to maintain said relay energized but only for corresponding positions of said rheostat and means responsive to said relay when denergized to return said rheostat to off position.

17. In a controller, in combination, a plurality of electro -responsive switches, means including a device movable at will to effect energization of said switches progressively and means to elfect return of said device automatically to initial position upon failure of any one of said switches to re, spond thereto.

18. In a controller, in combination, a plurality of electro-responsive switches, means including a device movable at will to effect energization of said switches progressively and means to efi'ect return of said device automatically to initial position upon failure of any one ofsaid devices to respond thereto or upon deenergization of one of said switches prior to response of the succeeding switch. 7

19 In a controller for a motor set including a small motor and a large motor, in

combination, separate electro-responsive switches controlling the continuity of circuit of the two motors, common control means for said switches to effect energization thereof progressively and means to directly control the small motor switch for inching, the latter means being dependent for effectiveness upon predetermined positioning of a part of said common control means but otherwise independent thereof.

20. In a controller for a motor set including a small motor and a large motor, in combination, separate electroresponsive switches to control the continuity of circuit of the two motors, common control means for said switches including a relay controllin the circuit of the small motor switch an means for energizing said small motor switch independently of said relay under predetermined conditions for inching.

21. In a controller for a motor set including a small motor and a large motor, in combination, separate electroresponsive switches to control the continuity of circuit of the two motors, means including an electro-responsive relay to eifect selective energization of said switches, said relay being energized independently of said switches but dependent for continued energization upon energization of one or the other of the same, and an automatic device interposed between said relay and the winding of the large motor switch to deenergize the same under predetermined conditions. i

In witness whereof, I have hereunto subscribed my name in the presence of two witnesses.

MAURICE M. GOLDENSTEIN.

Witnesses:

F. S. WILHOIT, M. WASHBURN, Jr. 

